CN100444607C - scan method - Google Patents

Abstract

A scanning method, suitable for a flatbed scanner with a transmission scanning function, which uses a surface light source to cover the area to be scanned of the transmission manuscript, and uses the preview scanning method to read the distribution range of the surface light source, and finally captures the transmission Position the manuscript and capture an image of the transmissive manuscript.

Description

scan method

technical field

The present invention relates to a scanning method, and in particular to a method for capturing the position of a transmissive manuscript.

Background technique

In recent years, due to the enhanced processing speed and data storage of products such as processors and computers, the performance of graphics processing has increased significantly, and image processing equipment, such as optical scanners, is also moving towards high-resolution and high-speed scanning in terms of functions. and request.

The common scanners on the market are mainly flatbed scanners. The flatbed scanner has an original surface such as a glass platform for placing a document or a pattern, and then an optical scanning module scans along the original surface to The image of the document or pattern is captured. Due to the simple structure and high expandability of flatbed scanners, in addition to scanning general reflective documents or patterns, they can also scan transmissive documents or negatives, so they are widely used.

The known flatbed scanner with transmission scanning function is usually equipped with an external photomask and an external transmission manuscript positioning sheet (film holder). Please refer to FIG. 1, which shows a known flatbed scanner with transmission scanning function. In the schematic diagram, the scanner 100 is configured with an optical scanning module 104 , a document surface 130 , an external photomask 120 and an external transmissive document positioning sheet 110 . Wherein, a transmissive manuscript 102 is placed on the manuscript surface 130, and the transmissive manuscript positioning sheet 110 is disposed on the manuscript surface 130, and the photomask 120 is disposed on the manuscript surface 130, and includes the area to be scanned of the transmissive manuscript 102, optically scanned The module 104 is used for scanning the transmissive manuscript 102 along the manuscript surface 130 .

Please refer to FIG. 1 and FIG. 2 at the same time. FIG. 2 shows the configuration diagram of a known transmissive scanning reticle and transmissive positioning sheet. The transmissive positioning sheet 110 has a scanning window 112, a calibration window 114 and four marks 116. When scanning the transmissive manuscript 102, the transmissive manuscript positioning sheet 110 is first placed on the manuscript surface 130 of the scanner 100, then the transmissive manuscript 102 is placed within the range of the scanning window 112, and then the external photomask 120 is placed on the corresponding There are four marks 116 , so the external photomask 120 covers the scanning window 112 and the calibration window 114 at the same time.

In addition, the external photomask 120 projects a light source 122 into the scanning window 112 and the calibration window 114, and finally the optical scanning module 104 captures the light transmitted through the scanning window 112 and the calibration window 114, and then recognizes the image of the transmissive manuscript 102 . Wherein, the purpose of the calibration window 114 is to read the signal of the light source in advance, and to correctly read the area covered by the scanning window 112 .

The known transmissive positioning sheet provides the scanner with the function of positioning and scanning the transmissive manuscript. However, once the transmissive manuscript positioning sheet is lost, it loses the functions of correcting and reading the scanning area. Scan jobs.

In addition, the scanning window limits the size of the transmissive manuscript, and the transmissive manuscript must be placed in the scanning window, which is very inconvenient for the user, and the calibration window also occupies the available scanning area, making the scanner unable to achieve maximum use scan range.

In addition, the external photomask must be aligned with the mark on the positioning sheet of the transmissive manuscript, and the angle cannot be changed arbitrarily, and the external photomask needs to be purchased separately, which is expensive and undoubtedly increases the purchase burden of consumers.

Contents of the invention

Therefore, the purpose of the present invention is to propose a scanning method, which uses a surface light source to cover the transmission manuscript, and uses preview scanning to determine the distribution range of the surface light source, and then performs transmission scanning only for the range covered by the surface light source.

In order to achieve the above-mentioned purpose of the present invention, a scanning method is proposed, which is suitable for a flatbed scanner with a transmission scanning function, wherein the flatbed scanner has an optical scanning module and a manuscript surface, and the manuscript surface is used to place a transmission manuscript , and the optical scanning module moves along the original surface. The scanning method includes: placing a transmissive manuscript on the original surface; providing a light source to cover the area to be scanned of the transmissive manuscript; using the optical scanning module to scan the original surface once to read the surface The distribution range of the light source; and the optical scanning module only scans the area covered by the surface light source to capture the image of the transmissive manuscript.

In order to achieve the above-mentioned purpose of the present invention, a method for grabbing the scanning position is proposed, which is suitable for a flatbed scanner with a transmission scanning function, wherein the flatbed scanner has an optical scanning module and a manuscript surface, and the manuscript surface is used A transmissive document is placed, and the optical scanning module moves along the original document surface, and the method of grabbing the scanning position includes: providing a light source on one side to cover the area to be scanned of the transmissive document; and scanning the original document surface once with the optical scanning module to read The distribution range of the surface light source, and capture the position of the transmission manuscript.

According to a preferred embodiment of the present invention, the surface light source is provided by an external photomask or a built-in photomask, and the external photomask or the built-in photomask is placed on the original surface. In addition, the transmissive manuscript is placed at any position on the manuscript surface at any angle.

In order to make the above-mentioned purpose, features, and advantages of the present invention more comprehensible, a preferred embodiment will be described in detail below together with the accompanying drawings.

Description of drawings

Fig. 1 depicts a known scanner with a transmission scanning function;

FIG. 2 shows the configuration diagram of a known transmission scanning mask and transmission manuscript positioning sheet;

Fig. 3 shows the configuration diagram of a scanner with transmission scanning function according to a preferred embodiment of the present invention

FIG. 4 shows a configuration diagram of a transmissive manuscript and a photomask in a preferred embodiment of the present invention; and

FIG. 5 is a schematic flowchart of a scanning method according to a preferred embodiment of the present invention.

Labeling instructions:

100: Scanner

102: Transmission Draft

104: Optical scanning module

110: Positioning film for transmissive draft

112: scan window

114: Correction window

116: mark

120: mask

122: surface light source

130: Original side

Detailed ways

Please refer to FIG. 3 , which shows a configuration diagram of a scanner with light-transmitting scanning function according to a preferred embodiment of the present invention. Wherein, the transmissive manuscript 102 is placed on the manuscript surface 130 , and the optical scanning module 104 is used to scan the transmissive manuscript 102 along the manuscript surface 130 . In addition, there is a surface light source 122 above the document surface 130 for projecting on the transmissive manuscript 102 , and the distribution area of the surface light source 122 is larger than the area to be scanned of the transmissive manuscript 102 . The surface light source 122 is, for example, provided by an external photomask 120 or a built-in photomask 120 , and the external photomask 120 or the built-in photomask 120 is placed on the original surface 130 .

The surface light source of this embodiment does not need to be provided by an external connection. For example, a known external photomask can also be used to configure a surface light source in the upper cover of the scanner by a built-in method, which can also perform transmission scanning, and the built-in The surface light source of the type mask has a large distribution range, which can be equivalent to the area of the scanning platform, which greatly improves the usable scanning range of the scanner.

The photomask generally has a light source, a light guide plate, and a housing. When the light from the light source is projected onto the light guide plate, it will guide the light into a surface light through the light guide plate, so that the seen light energy is distributed on the light guide plate, and The casing covers the light guide plate, so that the light is concentrated and projected on the surface of the original document as a surface light source for transmission scanning.

As shown in Figure 3, different from the known ones, this embodiment does not require an additional transmissive positioning sheet, but uses a preview scanning method to determine the distribution range of the surface light source 122, and then only for the surface light source 122 in the preview scan. The covered area is subjected to transmission scanning, and finally the optical scanning module 104 captures the transmitted light to identify the image of the transmission manuscript 102 .

Please refer to FIG. 4 , which shows a configuration diagram of a transmission manuscript and a photomask in a preferred embodiment of the present invention, wherein the transmission manuscript 102 can be placed at any position on the manuscript surface 130 at any angle, and the distribution range of the surface light source 122 is also The angle can be changed, and it is not limited to be placed on a fixed mark, such as a mark on a known transmissive manuscript positioning sheet, as long as it can cover the area to be scanned of the transmissive manuscript 102 .

Please refer to FIG. 5 , which shows a schematic flowchart of a scanning method according to a preferred embodiment of the present invention. The scanning method includes steps such as S200 (providing a transmissive manuscript), S202 (providing a surface light source), S204 (preview scanning), and S206 (capturing an image).

Wherein, in S200 (provide a transmissive document), first place the transmissive document 102 on the document surface 130 of the scanner 100 , and the transmissive document 102 can be a pattern or document such as a transparencies, positive and negative films.

S202 (Provide a surface light source), then provide a surface light source 122 to cover the area to be scanned of the transmissive manuscript 102, wherein the surface light source 122 can be formed by a built-in or external photomask.

S204 (preview scanning), use the optical scanning module 104 to scan the document surface 130 once to read the distribution range of the surface light source 122 . In addition, the optical scanning module 104 can pass through the correction window 114 to correct the brightness of the surface light source 122, and the correction window 114 is placed on the mask 120, and is located in the range where the surface light source 122 is distributed, so that the optical scanning module 104 can pass through When correcting the window 114, the brightness of the surface light source 122 is corrected.

S206 (capture image), finally, the optical scanning module 104 only scans the area covered by the surface light source 122 to capture the image of the transmissive manuscript 102 .

In summary, the scanning method of the present invention has at least the following advantages:

1. The scanning method of the present invention can scan transmissive documents without the need for a transmissive document positioning sheet, and is easy to use.

2. The scanning method of the present invention, wherein the transmissive manuscript can be placed at any position on the manuscript surface at any angle without positioning.

3. In the scanning method of the present invention, the surface light source can be provided by an external photomask or a built-in photomask, which has high practicability.

4. The scanning method of the present invention, wherein the angle of the surface light source can be changed without positioning through a fixed mark, which is convenient to use.

Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any skilled person can make various modifications and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be defined by the claims.

Claims (12)

1. scan method, be applicable to that one has the falt bed scanner of transmission scan function, wherein this platform-type scanner has an optic scan module and an original copy face, and this original copy face is in order to place a transmission original text, and this optic scan module moves along this original copy face, it is characterized in that this scan method comprises:

Place this transmission original text on this original copy face;

One area source is provided, and this area source contains the desire scanning area of covering this transmission original text;

Utilize this optic scan module to scan this original copy face one time, to read the distribution of this area source; And

This optic scan module only scans the zone of the contained lid of this area source, in order to capture the image of this transmission original text.

2. scan method as claimed in claim 1 is characterized in that, this transmission original text is positioned on this original copy face with arbitrarily angled.

3. scan method as claimed in claim 1 is characterized in that, this area source is provided by a circumscribed light shield.

4. scan method as claimed in claim 3 is characterized in that, this circumscribed light shield is positioned on this original copy face.

5. scan method as claimed in claim 1 is characterized in that, this area source is provided by an in-building type light shield.

6. scan method as claimed in claim 5 is characterized in that, this in-building type light shield is positioned on this original copy face.

7. method that grasps scanning position, be applicable to that one has the falt bed scanner of transmission scan function, it is characterized in that, this platform-type scanner has an optic scan module and an original copy face, and this original copy face is in order to place a transmission original text, and this optic scan module moves along this original copy face, and the method for this extracting scanning position comprises:

One area source is provided, and this area source contains the desire scanning area of covering this transmission original text; And

Utilize this optic scan module to scan this original copy face one time, reading the distribution of this area source, and grasp the position of this transmission original text.

8. the method for extracting scanning position as claimed in claim 7 is characterized in that, this transmission original text is positioned on this original copy face with arbitrarily angled.

9. the method for extracting scanning position as claimed in claim 7 is characterized in that, this area source is provided by a circumscribed light shield.

10. the method for extracting scanning position as claimed in claim 7 is characterized in that, this circumscribed light shield is positioned on this original copy face.

11. the method for extracting scanning position as claimed in claim 7 is characterized in that, this area source is provided by an in-building type light shield.

12. the method for extracting scanning position as claimed in claim 7 is characterized in that, this in-building type light shield is positioned on this original copy face.

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